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Table 1 Demographic characteristics of respondents and weighted monthly prevalence of acute gastrointestinal illness (AGI) in the 4 weeks prior to interview in Gansu Province, northwest China, June 2012May 2013 (n = 2094)

From: Estimating the burden of acute gastrointestinal illness in the community in Gansu Province, northwest China, 2012–2013

Variable Proportion of residents Proportion of survey respondents Monthly prevalence of AGI P-value
    % (95% CI)  
Sex      0.859
  Male 51.1 75.5 8.6 (6.9–10.3)  
  Female 48.9 24.5 8.4 (6.7–10.1)  
Age (years)      < 0.01
  0–4 5.4 2.1 12.4 (6.3–18.5)  
  5–14 12.7 3.2 19.2 (14.4–23.9)  
  15–24 18.6 4.3 11.9 (8.7–15.2)  
  25–44 32.6 33.5 5.2 (3.5–6.9)  
  45–64 22.4 43.6 4.4 (2.6–6.3)  
  ≥ 65 8.2 13.3 5.9 (2.4–9.4)  
Education      < 0.01
  Preschool children 6.5 2.4 11.5 (6.2–16.8)  
  Illiterate 9.6 10.0 7.3 (3.4–11.2)  
  Primary school 32.5 29.3 11.4 (8.7–14.1)  
  Secondary school 31.2 40.6 4.7 (3.2– 6.2)  
  High school and above 20.2 17.6 10.5 (7.8–13.2)  
  No responsea b
Yearly household income (CNY)      < 0.01
  0–19999 NA 26.0 3.3 (1.6–5.0)  
  20000–49999 NA 63.7 9.1 (7.6–10.6)  
  ≥ 50000 NA 9.6 13.7 (9.7–17.6)  
  No responsea 0.7
Household size (number of person)      < 0.01
  1–2 29.9 18.4 3.1 (1.1–5.0)  
  ≥ 3 70.1 81.6 9.4 (8.1–10.8)  
Household type      0.013
  No residents < 18 years NA 42.6 6.5 (4.7–8.2)  
  At least one resident < 18 years NA 57.4 9.7 (8.1–11.3)  
Residence      < 0.01
  Urban 35.9 23.5 11.7 (9.4–14.0)  
  Rural 64.1 76.5 6.7 (5.4–8.1)  
Season      0.045
  Winter NA 25.0 8.1 (5.9–10.3)  
  Spring NA 25.2 9.7 (7.1–12.2)  
  Summer NA 24.7 10.8 (7.8–13.7)  
  Autumn NA 25.1 6.0 (4.0–8.0)  
Sentinel site      < 0.01
  Baiyin 18.8 16.5 1.4 (0.2–2.6)  
  Liangzhou 64.5 62.8 5.6 (4.4–6.9)  
  Qingcheng 16.7 20.7 24.0 (19.9–28.1)  
  1. CI, Confidence interval; NA, Not available; CNY, China Yuan.
  2. aIndividuals who did not respond were excluded from analysis.
  3. bValue is less than 0.1.